I've found that it takes 3 or 4 rinses to get that chlorine taste out of the water. Yes, it uses a whole lot of water, and takes a long, long time. Just make sure you flush plenty of water through your lines to remove the chlorine from them, too.
2013 Eagle 266RKS
2011 Ford F-150 w/3.5L Ecoboost & H.D. Tow Package